Re: [Xen-devel] [PATCH v5 09/10] x86/HVM: don't needlessly intercept APERF/MPERF/TSC MSR reads

["Tian, Kevin" <kevin.tian@xxxxxxxxx>]

> From: Jan Beulich <jbeulich@xxxxxxxx>
> Sent: Tuesday, March 24, 2020 8:37 PM
> 
> If the hardware can handle accesses, we should allow it to do so. This
> way we can expose EFRO to HVM guests, and "all" that's left for exposing
> APERF/MPERF is to figure out how to handle writes to these MSRs. (Note
> that the leaf 6 guest CPUID checks will evaluate to false for now, as
> recalculate_misc() zaps the entire leaf for now.)
> 
> For TSC the intercepts are made mirror the RDTSC ones.
> 
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>